Valve having an inner washing structure
Valve having at least one annular valve seat element
Valve having at least one screen
Valve having ceramic components and associated fabrication...
Valve having convex sealing surface and concave seating surface
Valve having easily replaceable seat
Valve having ellipsoid valve member
Valve having fast and slow acting closure elements
Valve having four connection ports and two positions
Valve having hard and soft seats
Valve having integrity assurance means
Valve having internally pressurized sealing elements
Valve having junction type housing
Valve having magnetic force transmission apparatus
Valve having multi-part valve housing
Valve having multi-piece valve housing
Valve having pressure balancing piston and method involving...
Valve having provision for replacing stem packing while the valv
Valve having pyrotechnic separation device
Valve having rocker valve member and isolation diaphragm